Range is the difference between the highest and lowest of a set of numbers. When you have these values you take the lowest from the highest.
For example, if you were asked what is the range of the average temperature in Ireland if the coldest month was 6 °C and the hottest month was 16 °C, the range for the year’s temperature would be 10 °C.
NUMERACY ACT VITY
Look at rainfall for Shannon Airport, 2016. What was the range for the year? Rainfall at Shannon Airport for 2016
Rainfall (mm)
Jan Feb Mar Apr May Jun 107
144 64 42 45 68
Jul Aug Sep Oct Nov Dec 66
107 88 35 69 74
Mean The mean is the average of a set of numbers.
For example, if you were asked to find the mean of 24, 27, 19 and 18, you would add up the four numbers and then divide the answer by 4.
24 + 27 + 19 + 18 = 88 88 = 22 4
The mean of 24, 27, 19 and 18 is 22. NUMERACY ACT VITY
Look at the monthly temperatures for Ireland in 2016. What was the mean temperature for Ireland in 2016?
Monthly temperatures in Ireland in 2016 Temperature (°C)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 6
5 7 8 12 15 16 16 14 11 6 6
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Geographical Skills for Second Years: Ordnance Survey and aerial photograph skills
